LSC: Delete uses of goog.isDefAndNotNull, goog.isDef, goog.isNull, goog.isString, goog.isBoolean, and goog.isNumber.
LSC: Delete uses of goog.isDefAndNotNull, goog.isDef, goog.isNull,
goog.isString, goog.isBoolean, and goog.isNumber.

These functions are all trivial one-liners that inline to clearer code
that is nearly as small (and in some cases even smaller) than the
function call.

This CL was built by hand, looking for any remaining non-JS files to
fix.

google/lovefield,google/lovefield,google/lovefield