Remove leftovers of deprecated SPV_INTEL_fast_composite (#3607)

Author: vmaksimo

include/LLVMSPIRVExtensions.inc

@@ -37,7 +37,6 @@ EXT(SPV_INTEL_arbitrary_precision_integers)
 EXT(SPV_INTEL_optimization_hints)
 EXT(SPV_INTEL_float_controls2)
 EXT(SPV_INTEL_vector_compute)
-EXT(SPV_INTEL_fast_composite) // TODO: to remove
 EXT(SPV_INTEL_usm_storage_classes)
 EXT(SPV_INTEL_fpga_buffer_location)
 EXT(SPV_INTEL_arbitrary_precision_fixed_point)

lib/SPIRV/libSPIRV/spirv_internal.hpp

@@ -91,7 +91,6 @@ enum InternalOp {
 
 enum InternalDecoration {
   IDecRuntimeAlignedINTEL = 5940,
-  IDecCallableFunctionINTEL = 6087,
   IDecHostAccessINTEL = 6147,
   IDecInitModeINTEL = 6148,
   IDecImplementInCSRINTEL = 6149,