Remove build systems other than CMake

Make it clear that CMake is the only supported build system.

Signed-off-by: Kevin Petit <kevin.petit@arm.com>

test_conformance/half/Jamfile

@@ -1,22 +0,0 @@
-project
-    : requirements
-      -<library>/harness//harness <use>/harness//harness
-#      <toolset>gcc:<cflags>-xc++
-      <toolset>msvc:<cflags>"/TP"
-    ;
-
-exe Test_half
-    : cl_utils.c
-      main.c
-      Test_roundTrip.c
-      Test_vLoadHalf.c
-      Test_vStoreHalf.c
-      /harness//errorHelpers.c
-    : <target-os>windows:<source>/harness//msvc9.c
-    ;
-
-install dist
-    : Test_half
-    : <variant>debug:<location>$(DIST)/debug/tests/test_conformance/half
-      <variant>release:<location>$(DIST)/release/tests/test_conformance/half
-    ;

test_conformance/half/Makefile

@@ -1,40 +0,0 @@
-ifdef BUILD_WITH_ATF
-ATF = -framework ATF
-USE_ATF = -DUSE_ATF
-endif
-
-SRCS = main.c \
-			cl_utils.c \
-			Test_vLoadHalf.c \
-			Test_roundTrip.c \
-			Test_vStoreHalf.c \
-			../../test_common/harness/errorHelpers.c \
-			../../test_common/harness/kernelHelpers.c \
-			../../test_common/harness/mingw_compat.c \
-			../../test_common/harness/testHarness.c
-
-SOURCES = $(abspath $(SRCS))
-LIBPATH += -L/System/Library/Frameworks/OpenCL.framework/Libraries
-LIBPATH += -L.
-FRAMEWORK = $(SOURCES)
-HEADERS =
-TARGET = Test_half
-INCLUDE =
-COMPILERFLAGS = -c -Wall -g
-CC =  ${CROSS_COMPILE}g++
-CFLAGS = $(COMPILERFLAGS) ${RC_CFLAGS} ${USE_ATF} $(INCLUDE)
-LIBRARIES = -framework OpenCL ${ATF}
-
-OBJECTS := ${SOURCES:.c=.o}
-
-TARGETOBJECT =
-all: $(TARGET)
-
-$(TARGET): $(OBJECTS)
-	$(CC) $(INCLUDE) $(RC_CFLAGS) $(OBJECTS) -o $@ $(LIBPATH) $(LIBRARIES)
-
-clean:
-	rm -f $(TARGET) $(OBJECTS)
-
-.DEFAULT:
-	@echo The target \"$@\" does not exist in Makefile.