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/select/Jamfile

@@ -1,21 +0,0 @@
-project
-    : requirements
-      -<library>/harness//harness <use>/harness//harness
-#      <toolset>gcc:<cflags>-xc
-      <toolset>msvc:<cflags>"/TP" 
-    ;
-
-exe test_select
-    : test_select.c
-      util_select.c
-      /harness//mt19937.c
-      /harness//kernelHelpers.c
-      /harness//errorHelpers.c
-    : <target-os>windows:<source>/harness//msvc9.c
-    ;
-
-install dist
-    : test_select
-    : <variant>debug:<location>$(DIST)/debug/tests/test_conformance/select
-      <variant>release:<location>$(DIST)/release/tests/test_conformance/select
-    ;

test_conformance/select/Makefile

@@ -1,33 +0,0 @@
-ifdef BUILD_WITH_ATF
-ATF = -framework ATF
-USE_ATF = -DUSE_ATF
-endif
-
-SRCS = test_select.c util_select.c ../../test_common/harness/mt19937.c ../../test_common/harness/kernelHelpers.c ../../test_common/harness/errorHelpers.c
-
-LIBPATH += -L/System/Library/Frameworks/OpenCL.framework/Libraries
-LIBPATH += -L.
-FRAMEWORK = $(abspath $(SRCS))
-HEADERS =  test_select.h
-TARGET = test_select
-INCLUDE = 
-COMPILERFLAGS = -c -Wall -g -Os -Wshorten-64-to-32
-CC = c++
-CFLAGS = $(COMPILERFLAGS) ${RC_CFLAGS} ${USE_ATF}
-LIBRARIES = -framework OpenCL ${ATF}
-
-OBJECTS = test_select.o util_select.o mt19937.o kernelHelpers.o errorHelpers.o
-TARGETOBJECT =
-all: $(TARGET)
-
-$(OBJECTS): $(FRAMEWORK) $(HEADERS)
-	$(CC) $(CFLAGS) $(INCLUDE) $(FRAMEWORK)
-
-$(TARGET): $(OBJECTS)
-	$(CC) $(RC_CFLAGS) $(OBJECTS) -o $@ $(LIBPATH) $(LIBRARIES)
-
-clean:
-	rm -f $(TARGET) $(OBJECTS)
-
-.DEFAULT:
-	@echo The target \"$@\" does not exist in Makefile.