Removed unused methods from edm::View

All the uses of the refPtr and refVector interfaces were removed
from CMSSW. This is in anticipation of a future code change which
can not support those interfaces. Removing them from View now insures
that no new code tries to use them.
Merge pull request #6495 from Dr15Jones/removeOldInterfaceFromView

Removed unused methods from edm::View
Merge remote branch 'origin/CMSSW_7_3_X' into CMSSW_7_0_X