clang-format: Remove the override of PenaltyExcessCharacter.

So it falls back (from 32) to the default value in Google style:
PenaltyExcessCharacter: 1000000

This way it no longer allows lines exceeding the 100-char limit.

const char* x[] = { "long enough so that the line has 101 chars", nullptr };

  would become

const char* x[] = { "long enough so that the line has 101 chars",
                    nullptr };

Test: clang-format the line above.
Change-Id: If578dbdae55d6d81f5e47889890e2afa12b4199a

.clang-format

@@ -10,6 +10,5 @@ IndentWidth: 2
 PointerAlignment: Left
 TabWidth: 2
 UseTab: Never
-PenaltyExcessCharacter: 32
 
 Cpp11BracedListStyle: false