[C++] Remove old libCommon CMakeLists.txt.
[C++] Remove old libCommon CMakeLists.txt.

Change-Id: Ibe55e25e2be10e87c8814a8b4ae02fb33065185f

bmwcarit/joynr,bmwcarit/joynr,clive-jevons/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,clive-jevons/joynr,bmwcarit/joynr,bmwcarit/joynr,clive-jevons/joynr,clive-jevons/joynr,clive-jevons/joynr,clive-jevons/joynr,bmwcarit/joynr,bmwcarit/joynr