Rythmos: Remove listing of undefined TPL deps (trilinos#11152)

Updated TriBITS 'master' now catches undefined TPLs listed as dependencies of
a TriBITS package.  (Amazingly, classic TriBITS simply silently ignored these
undefined TPLs.  See tribits/CHANGELOG.md entry in TriBITSPub/TriBITS#530.)

This works with older TriBITS and will be needed when TriBITS 'master' is
snapshotted into Trilinos 'develop'.

packages/rythmos/cmake/Dependencies.cmake

@@ -3,6 +3,6 @@ SET(LIB_OPTIONAL_DEP_PACKAGES)
 SET(TEST_REQUIRED_DEP_PACKAGES)
 SET(TEST_OPTIONAL_DEP_PACKAGES EpetraExt ThyraEpetraAdapters ThyraEpetraExtAdapters Sacado Stratimikos Belos NOX)
 SET(LIB_REQUIRED_DEP_TPLS)
-SET(LIB_OPTIONAL_DEP_TPLS GaaspTpl Boost)
+SET(LIB_OPTIONAL_DEP_TPLS Boost)
 SET(TEST_REQUIRED_DEP_TPLS)
 SET(TEST_OPTIONAL_DEP_TPLS)