Search for static method w/o overloads should be exact match in static import

[eric-milles]

Consider the following:

import static Pogo.meth
class Pogo {
  static meth() {}
}
meth()

Searching for references (Ctrl+Shift+G) produces 1 exact match (the call meth()) and 1 potential match (in the static import). Since there are no overloads, the reference is not ambiguous and should be indicated as exact.