Remove LD_PRELOAD from profile scripts.

Tcmalloc causes emacs to crash so don't pollute the standard environment
with it.
Refs #10271

Code/Mantid/Build/CMake/LinuxPackageScripts.cmake

@@ -37,13 +37,8 @@ file ( WRITE ${CMAKE_CURRENT_BINARY_DIR}/mantid.sh
   "PV_PLUGIN_PATH=${CMAKE_INSTALL_PREFIX}/${PVPLUGINS_DIR}/${PVPLUGINS_DIR}\n"
   "PATH=$PATH:$MANTIDPATH\n"
   "PYTHONPATH=$MANTIDPATH:$PYTHONPATH\n"
-  "LD_PRELOAD=${EXTRA_LDPRELOAD_LIBS}:\${LD_PRELOAD}\n"
-  "if [ -z \"\${TCMALLOC_RELEASE_RATE}\" ]; then\n"
-  "    TCMALLOC_RELEASE_RATE=10000\n"
-  "    export TCMALLOC_RELEASE_RATE\n"
-  "fi\n"
 
-  "export MANTIDPATH PV_PLUGIN_PATH PATH PYTHONPATH LD_PRELOAD\n"
+  "export MANTIDPATH PV_PLUGIN_PATH PATH PYTHONPATH\n"
 )
 
 # c-shell
@@ -52,10 +47,7 @@ file ( WRITE ${CMAKE_CURRENT_BINARY_DIR}/mantid.csh
   "setenv MANTIDPATH \"${CMAKE_INSTALL_PREFIX}/${BIN_DIR}\"\n"
   "setenv PV_PLUGIN_PATH \"${CMAKE_INSTALL_PREFIX}/${PVPLUGINS_DIR}/${PVPLUGINS_DIR}\"\n"
   "setenv PATH \"\${PATH}:\${MANTIDPATH}\"\n"
-  "set LD_PRELOAD \"${EXTRA_LDPRELOAD_LIBS}:\${LD_PRELOAD}\"\n"
-  "if ($?TCMALLOC_RELEASE_RATE) then\n"
-  "  setenv TCMALLOC_RELEASE_RATE 10000\n"
-  "endif\n"
+
   "if ($?PYTHONPATH) then\n"
   "  setenv PYTHONPATH \"\${MANTIDPATH}:\${PYTHONPATH}\"\n"
   "else\n"