Address review feedback

* Remove extraneous `cl_khr_command_buffer_multi_device` precondition
  from error wording.
* Change "enabled" terminology to "supported" with regards to
  extensions.

Author: EwanC

api/opencl_runtime_layer.asciidoc

@@ -14370,8 +14370,7 @@ Otherwise, it returns one of the following errors:
   * {CL_INVALID_COMMAND_BUFFER_KHR} if _command_buffer_ is not a valid
     command-buffer.
 ifdef::cl_khr_command_buffer_multi_device[]
-  * {CL_INVALID_CONTEXT} if the {cl_khr_command_buffer_multi_device_EXT}
-    extension is enabled, and _command_queue_ is not `NULL`, and the context
+  * {CL_INVALID_CONTEXT} if _command_queue_ is not `NULL`, and the context
     associated with _command_queue_ and _command_buffer_ is not the same.
 endif::cl_khr_command_buffer_multi_device[]
   * {CL_INVALID_OPERATION} if _command_buffer_ has been finalized.
@@ -14458,8 +14457,7 @@ Otherwise, it returns the errors defined by {clEnqueueCopyBuffer} except:
   * {CL_INVALID_CONTEXT} if the context associated with _command_buffer_,
     _src_buffer_, and _dst_buffer_ is not the same.
 ifdef::cl_khr_command_buffer_multi_device[]
-  * {CL_INVALID_CONTEXT} if the {cl_khr_command_buffer_multi_device_EXT}
-    extension is enabled, and _command_queue_ is not `NULL`, and the context
+  * {CL_INVALID_CONTEXT} if _command_queue_ is not `NULL`, and the context
     associated with _command_queue_ and _command_buffer_ is not the same.
 endif::cl_khr_command_buffer_multi_device[]
 
@@ -14568,8 +14566,7 @@ except:
   * {CL_INVALID_CONTEXT} if the context associated with _command_buffer_,
     _src_buffer_, and _dst_buffer_ is not the same.
 ifdef::cl_khr_command_buffer_multi_device[]
-  * {CL_INVALID_CONTEXT} if the {cl_khr_command_buffer_multi_device_EXT}
-    extension is enabled, and _command_queue_ is not `NULL`, and the context
+  * {CL_INVALID_CONTEXT} if _command_queue_ is not `NULL`, and the context
     associated with _command_queue_ and _command_buffer_ is not the same.
 endif::cl_khr_command_buffer_multi_device[]
 
@@ -14661,8 +14658,7 @@ except:
   * {CL_INVALID_CONTEXT} if the context associated with _command_buffer_,
     _src_buffer_, and _dst_image_ is not the same.
 ifdef::cl_khr_command_buffer_multi_device[]
-  * {CL_INVALID_CONTEXT} if the {cl_khr_command_buffer_multi_device_EXT}
-    extension is enabled, and _command_queue_ is not `NULL`, and the context
+  * {CL_INVALID_CONTEXT} if _command_queue_ is not `NULL`, and the context
     associated with _command_queue_ and _command_buffer_ is not the same.
 endif::cl_khr_command_buffer_multi_device[]
 
@@ -14760,8 +14756,7 @@ Otherwise, it returns the errors defined by {clEnqueueCopyImage} except:
   * {CL_INVALID_CONTEXT} if the context associated with _command_buffer_,
     _src_image_, and _dst_image_ is not the same.
 ifdef::cl_khr_command_buffer_multi_device[]
-  * {CL_INVALID_CONTEXT} if the {cl_khr_command_buffer_multi_device_EXT}
-    extension is enabled, and _command_queue_ is not `NULL`, and the context
+  * {CL_INVALID_CONTEXT} if _command_queue_ is not `NULL`, and the context
     associated with _command_queue_ and _command_buffer_ is not the same.
 endif::cl_khr_command_buffer_multi_device[]
 
@@ -14853,8 +14848,7 @@ except:
   * {CL_INVALID_CONTEXT} if the context associated with _command_buffer_,
     _src_image_, and _dst_buffer_ is not the same.
 ifdef::cl_khr_command_buffer_multi_device[]
-  * {CL_INVALID_CONTEXT} if the {cl_khr_command_buffer_multi_device_EXT}
-    extension is enabled, and _command_queue_ is not `NULL`, and the context
+  * {CL_INVALID_CONTEXT} _command_queue_ is not `NULL`, and the context
     associated with _command_queue_ and _command_buffer_ is not the same.
 endif::cl_khr_command_buffer_multi_device[]
 
@@ -14953,8 +14947,7 @@ Otherwise, it returns the errors defined by {clEnqueueFillBuffer} except:
   * {CL_INVALID_CONTEXT} if the context associated with _command_buffer_ and
     _buffer_ is not the same.
 ifdef::cl_khr_command_buffer_multi_device[]
-  * {CL_INVALID_CONTEXT} if the {cl_khr_command_buffer_multi_device_EXT}
-    extension is enabled, and _command_queue_ is not `NULL`, and the context
+  * {CL_INVALID_CONTEXT} if _command_queue_ is not `NULL`, and the context
     associated with _command_queue_ and _command_buffer_ is not the same.
 endif::cl_khr_command_buffer_multi_device[]
 
@@ -15051,8 +15044,7 @@ Otherwise, it returns the errors defined by {clEnqueueFillImage} except:
   * {CL_INVALID_CONTEXT} if the context associated with _command_buffer_ and
     _image_ is not the same.
 ifdef::cl_khr_command_buffer_multi_device[]
-  * {CL_INVALID_CONTEXT} if the {cl_khr_command_buffer_multi_device_EXT}
-    extension is enabled, and _command_queue_ is not `NULL`, and the context
+  * {CL_INVALID_CONTEXT} if _command_queue_ is not `NULL`, and the context
     associated with _command_queue_ and _command_buffer_ is not the same.
 endif::cl_khr_command_buffer_multi_device[]
 
@@ -15300,8 +15292,7 @@ Otherwise, it returns the errors defined by {clEnqueueNDRangeKernel} except:
   * {CL_INVALID_CONTEXT} if the context associated with _command_buffer_ and
     _kernel_ is not the same.
 ifdef::cl_khr_command_buffer_multi_device[]
-  * {CL_INVALID_CONTEXT} if the {cl_khr_command_buffer_multi_device_EXT}
-    extension is enabled, and _command_queue_ is not `NULL`, and the context
+  * {CL_INVALID_CONTEXT} if _command_queue_ is not `NULL`, and the context
     associated with _command_queue_ and _command_buffer_ is not the same.
 endif::cl_khr_command_buffer_multi_device[]
 
@@ -15419,8 +15410,7 @@ Otherwise, it returns the errors defined by {clEnqueueSVMMemcpy} except:
 ifdef::cl_khr_command_buffer_multi_device[]
 {CL_INVALID_CONTEXT} is replaced with:
 
-  * {CL_INVALID_CONTEXT} if the {cl_khr_command_buffer_multi_device_EXT}
-    extension is enabled, and _command_queue_ is not `NULL`, and the context
+  * {CL_INVALID_CONTEXT} if _command_queue_ is not `NULL`, and the context
     associated with _command_queue_ and _command_buffer_ is not the same.
 
 endif::cl_khr_command_buffer_multi_device[]
@@ -15533,8 +15523,7 @@ successfully. Otherwise, it returns the errors defined by
 ifdef::cl_khr_command_buffer_multi_device[]
 {CL_INVALID_CONTEXT} is replaced with:
 
-  * {CL_INVALID_CONTEXT} if the {cl_khr_command_buffer_multi_device_EXT}
-    extension is enabled, and _command_queue_ is not `NULL`, and the context
+  * {CL_INVALID_CONTEXT} if _command_queue_ is not `NULL`, and the context
     associated with _command_queue_ and _command_buffer_ is not the same.
 endif::cl_khr_command_buffer_multi_device[]