hg: jdk/sandbox: 8231990: Remove unnecessary else-if branch in Types.union

[chris.hegarty at oracle.com]

Changeset: 55d2e10ea134
Author:    cushon
Date:      2019-10-09 10:02 -0700
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/55d2e10ea134

8231990: Remove unnecessary else-if branch in Types.union
Reviewed-by: mcimadamore
Contributed-by: Brad Corso <bcorso at google.com>

! src/jdk.compiler/share/classes/com/sun/tools/javac/code/Types.java