Utilities/Release: Drop IBM AIX release scripts

We no longer produce binaries for AIX.

Utilities/Release/create-cmake-release.cmake

@@ -11,7 +11,6 @@ set(RELEASE_SCRIPTS_BATCH_1
   dashmacmini5_release.cmake  # Mac Darwin64 universal x86_64;i386
   magrathea_release.cmake     # Linux
   linux64_release.cmake       # Linux x86_64
-  ibm_aix_release.cmake       # AIX
 )
 
 set(RELEASE_SCRIPTS_BATCH_2

Utilities/Release/ibm_aix_release.cmake

-set(CMAKE_RELEASE_DIRECTORY "/bench1/noibm34/CMakeReleaseDirectory")
-set(PROCESSORS 64)
-set(HOST "ibm-backend")
-set(SCRIPT_NAME aix)
-set(MAKE_PROGRAM "make")
-set(CC "xlc_r")
-set(CXX "xlC_r")
-set(FC "xlf")
-set(LDFLAGS "-Wl,-bmaxdata:0x80000000") # Push "Segmentation fault in extend_brk" over horizon
-set(INITIAL_CACHE "
-CMAKE_BUILD_TYPE:STRING=Release
-CMAKE_SKIP_BOOTSTRAP_TEST:STRING=TRUE
-")
-get_filename_component(path "${CMAKE_CURRENT_LIST_FILE}" PATH)
-include(${path}/release_cmake.cmake)