build : remove obsolete compile flag [no ci]

Author: ggerganov

Makefile

@@ -877,10 +877,6 @@ endif # GGML_HIPBLAS
 ifdef GGML_METAL
 	MK_CPPFLAGS += -DGGML_USE_METAL
 
-ifdef GGML_METAL_FORCE_FATTN_PREC_F16
-	MK_CPPFLAGS += -DGGML_METAL_FORCE_FATTN_PREC_F16
-endif # GGML_METAL_FORCE_FATTN_PREC_F16
-
 	MK_LDFLAGS  += -framework Foundation -framework Metal -framework MetalKit
 	OBJ_GGML	+= ggml/src/ggml-metal.o
 ifdef GGML_METAL_NDEBUG

ggml/CMakeLists.txt

@@ -153,7 +153,6 @@ option(GGML_VULKAN_VALIDATE                 "ggml: enable Vulkan validation"
 option(GGML_VULKAN_RUN_TESTS                "ggml: run Vulkan tests"                          OFF)
 option(GGML_KOMPUTE                         "ggml: use Kompute"                               OFF)
 option(GGML_METAL                           "ggml: use Metal"                                 ${GGML_METAL_DEFAULT})
-option(GGML_METAL_FORCE_FATTN_PREC_F16      "ggml: force F16 accumulators for FA kernels"     OFF)
 option(GGML_METAL_NDEBUG                    "ggml: disable Metal debugging"                   OFF)
 option(GGML_METAL_SHADER_DEBUG              "ggml: compile Metal with -fno-fast-math"         OFF)
 option(GGML_METAL_EMBED_LIBRARY             "ggml: embed Metal library"                       ${GGML_METAL})

ggml/src/CMakeLists.txt

@@ -58,10 +58,6 @@ if (GGML_METAL)
         add_compile_definitions(GGML_METAL_NDEBUG)
     endif()
 
-    if (GGML_METAL_FORCE_FATTN_PREC_F16)
-        add_compile_definitions(GGML_METAL_FORCE_FATTN_PREC_F16)
-    endif()
-
     # copy ggml-common.h and ggml-metal.metal to bin directory
     configure_file(ggml-common.h    ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/ggml-common.h    COPYONLY)
     configure_file(ggml-metal.metal ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/ggml-metal.metal COPYONLY)