remove overly general error condition

Author: bashbaug

api/opencl_runtime_layer.asciidoc

@@ -11039,7 +11039,6 @@ Otherwise, it returns one of the following errors:
     ** if _arg_value_ points to the data to be used as the kernel argument value
     and _arg_size_ does not match the size of the data type for the argument
   * {CL_INVALID_ARG_VALUE}
-    ** if _arg_value_ is not a valid value.
     ** if the argument is an image declared with the `read_only` qualifier and
     _arg_value_ points to an image object created with the memory flag
     {CL_MEM_WRITE_ONLY}