hg: code-tools/jtreg: remove vestiges of samevm mode

[jonathan.gibbons at oracle.com]

Changeset: f4b2d766822d
Author:    jjg
Date:      2018-08-08 15:27 -0700
URL:       http://hg.openjdk.java.net/code-tools/jtreg/rev/f4b2d766822d

remove vestiges of samevm mode

! src/share/classes/com/sun/javatest/regtest/config/ExecMode.java
! src/share/classes/com/sun/javatest/regtest/tool/Tool.java
! src/share/classes/com/sun/javatest/regtest/tool/i18n.properties