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/computeinfo/Jamfile

@@ -1,13 +0,0 @@
-project
-    : requirements
-#      <toolset>gcc:<cflags>-xc++
-      <toolset>msvc:<cflags>"/TP"
-    ;
-
-exe computeinfo : main.c ;
-
-install dist
-    : computeinfo
-    : <variant>debug:<location>$(DIST)/debug/tests/test_conformance/computeinfo
-      <variant>release:<location>$(DIST)/release/tests/test_conformance/computeinfo
-    ;

test_conformance/computeinfo/Makefile

@@ -1,32 +0,0 @@
-ifdef BUILD_WITH_ATF
-ATF = -framework ATF
-USE_ATF = -DUSE_ATF
-endif
-
-LIBPATH += -L/System/Library/Frameworks/OpenCL.framework/Libraries
-LIBPATH += -L.
-FRAMEWORK = main.c ../../test_common/harness/errorHelpers.c ../../test_common/harness/kernelHelpers.c 
-HEADERS = 
-TARGET = computeinfo
-INCLUDE = -I./../../OpenCL/cl_headers/public
-COMPILERFLAGS = -c -Wall -g -Wshorten-64-to-32
-CC = c++
-CFLAGS = $(COMPILERFLAGS) ${RC_CFLAGS} ${USE_ATF}
-LIBRARIES = -framework OpenCL -framework OpenGL -framework GLUT -framework AppKit ${RC_CFLAGS} ${ATF}
-
-OBJECTS = main.o errorHelpers.o kernelHelpers.o
-
-TARGETOBJECT =
-all: $(TARGET)
-
-$(OBJECTS): $(FRAMEWORK) $(HEADERS)
-	$(CC) $(CFLAGS) $(INCLUDE) $(FRAMEWORK)
-
-$(TARGET): $(OBJECTS)
-	$(CC) $(OBJECTS) -o $@ $(LIBPATH) $(LIBRARIES)
-
-clean:
-	rm -f $(TARGET) $(OBJECTS)
-
-.DEFAULT:
-	@echo The target \"$@\" does not exist in Makefile.