Revert "Fix broken tests due to new error output."

This reverts commit ec7c94f8e6860968d384b578e5564a9c55c80b4a and
re-enables OptionValidators.

llvm-svn: 212627
diff --git a/lldb/source/Interpreter/OptionGroupFormat.cpp b/lldb/source/Interpreter/OptionGroupFormat.cpp
index f929b55..601a784 100644
--- a/lldb/source/Interpreter/OptionGroupFormat.cpp
+++ b/lldb/source/Interpreter/OptionGroupFormat.cpp
@@ -42,10 +42,10 @@
 static OptionDefinition 
 g_option_table[] =
 {
-{ LLDB_OPT_SET_1, false, "format"    ,'f', OptionParser::eRequiredArgument, nullptr, 0, eArgTypeFormat   , "Specify a format to be used for display."},
-{ LLDB_OPT_SET_2, false, "gdb-format",'G', OptionParser::eRequiredArgument, nullptr, 0, eArgTypeGDBFormat, "Specify a format using a GDB format specifier string."},
-{ LLDB_OPT_SET_3, false, "size"      ,'s', OptionParser::eRequiredArgument, nullptr, 0, eArgTypeByteSize , "The size in bytes to use when displaying with the selected format."},
-{ LLDB_OPT_SET_4, false, "count"     ,'c', OptionParser::eRequiredArgument, nullptr, 0, eArgTypeCount    , "The number of total items to display."},
+{ LLDB_OPT_SET_1, false, "format"    ,'f', OptionParser::eRequiredArgument, nullptr, nullptr, 0, eArgTypeFormat   , "Specify a format to be used for display."},
+{ LLDB_OPT_SET_2, false, "gdb-format",'G', OptionParser::eRequiredArgument, nullptr, nullptr, 0, eArgTypeGDBFormat, "Specify a format using a GDB format specifier string."},
+{ LLDB_OPT_SET_3, false, "size"      ,'s', OptionParser::eRequiredArgument, nullptr, nullptr, 0, eArgTypeByteSize , "The size in bytes to use when displaying with the selected format."},
+{ LLDB_OPT_SET_4, false, "count"     ,'c', OptionParser::eRequiredArgument, nullptr, nullptr, 0, eArgTypeCount    , "The number of total items to display."},
 };
 
 uint32_t