Delete unused GSMPhone debugging code.

Manual cherry picks of internal changes:
- 9bb18bb9f325269c213eaed8f25ff1f1843093f7
- 67d6ba34ef5299b98a8d53f19bd499be1ec176ba

I've manually cherry picked them because the branches
are substantially different, and the changes are
dependant on each other.

Change-Id: I63ba8b93f77d461dc1d01252805e0804ba678c43

Conflicts:
	src/java/com/android/internal/telephony/gsm/GSMPhone.java