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_common/harness/Jamfile

@@ -1,18 +0,0 @@
-project
-    : requirements <include>.
-      <toolset>gcc:<cflags>"-xc++"
-      <toolset>msvc:<cflags>"/TP"
-      <warnings-as-errors>off
-    : usage-requirements <include>.
-    ;
-
-local harness.objs ;
-for source in [ glob *.c *.cpp ]
-{
-    harness.objs += [ obj $(source:B).obj : $(source) ] ;
-}
-
-alias harness : $(harness.objs)
-    : <use>/Runtime//OpenCL.lib : 
-    : <library>/Runtime//OpenCL.lib
-    ;

test_common/harness/Makefile

@@ -1,41 +0,0 @@
-ifdef BUILD_WITH_ATF
-ATF = -framework ATF
-USE_ATF = -DUSE_ATF
-endif
-
-SRCS = conversions.c \
-	errorHelpers.c \
-	genericThread.cpp \
-	imageHelpers.cpp \
-	kernelHelpers.c \
-	mt19937.c \
-	rounding_mode.c \
-	testHarness.c \
-	testHarness.cpp \
-	ThreadPool.c \
-	threadTesting.c \
-	typeWrappers.cpp
-		  
-DEFINES = DONT_TEST_GARBAGE_POINTERS
-
-SOURCES = $(abspath $(SRCS))
-LIBPATH += -L/System/Library/Frameworks/OpenCL.framework/Libraries
-LIBPATH += -L.
-HEADERS = 
-INCLUDE = 
-COMPILERFLAGS = -c -Wall -g -Wshorten-64-to-32
-CC = c++
-CFLAGS = $(COMPILERFLAGS) ${RC_CFLAGS} ${USE_ATF} $(DEFINES:%=-D%) $(INCLUDE)
-CXXFLAGS = $(COMPILERFLAGS) ${RC_CFLAGS} ${USE_ATF} $(DEFINES:%=-D%) $(INCLUDE)
-LIBRARIES = -framework OpenCL -framework OpenGL -framework GLUT -framework AppKit ${ATF}
-
-OBJECTS := ${SOURCES:.c=.o}
-OBJECTS := ${OBJECTS:.cpp=.o}
-
-all: $(OBJECTS)
-
-clean:
-	rm -f $(OBJECTS)
-
-.DEFAULT:
-	@echo The target \"$@\" does not exist in Makefile.