Removed 2 oldest previous versions

These 2 versions require binary GitHub repositories to complete their
install. I want to delete those GitHub repositories that contain
nothing but binaries.

Author: adamgreen

README.creole

@@ -12,8 +12,6 @@
 [[https://github.com/adamgreen/gcc4mbed/tree/gcc4.8-2014-q1_mbed88|GCC ARM Embedded 4.8-2014-q1-update with mbed SDK revision 88]]\\
 [[https://github.com/adamgreen/gcc4mbed/tree/gcc4.8-2014-q1_mbed85|GCC ARM Embedded 4.8-2014-q1-update with mbed SDK revision 85]]\\
 [[https://github.com/adamgreen/gcc4mbed/tree/gcc4.8-2014-q1_mbed84|GCC ARM Embedded 4.8-2014-q1-update with mbed SDK revision 84]]\\
-[[https://github.com/adamgreen/gcc4mbed/tree/gcc4.7-2012-q4_mbed54|GCC ARM Embedded 4.7-2012-q4-major with mbed SDK revision 54]]\\
-[[https://github.com/adamgreen/gcc4mbed/tree/gcc4.6-2012-q1_mbed43|GCC ARM Embedded 4.6-2012-q1-update with mbed SDK revision 43]]\\
 
 ==Quick Start
 These are the quick steps to get gcc4mbed installed on your computer: