Fix printchplbuilds.py error on GASNET_VERSION (chapel-lang#26356)

Previously printchplbuilds.py was broken, probably by myself in chapel-lang#25875

Example:
```
$ ./util/chplenv/printchplbuilds.py
Traceback (most recent call last):
  File "./util/chplenv/printchplbuilds.py", line 466, in <module>
    main(sys.argv)
  File "./util/chplenv/printchplbuilds.py", line 373, in main
    build = Parse(path)
  File "./util/chplenv/printchplbuilds.py", line 133, in Parse
    var = varNames[state]
KeyError: <State.GASNET_VERSION: 11>
```

[Contributed by @bonachea. Reviewed and merged by @jabraham17]

util/chplenv/printchplbuilds.py

@@ -36,7 +36,6 @@ class State(Enum):
     TARGET_ARCH =       8
     COMM_SUBSTRATE =    9
     GASNET_SEGMENT =    10
-    GASNET_VERSION =    11
 
 # Maps component prefix to corresponding environment variable.
 
@@ -93,8 +92,7 @@ class State(Enum):
     State.HWLOC:            State.RE2,
     State.RE2:              State.PREFIX,
     State.COMM_SUBSTRATE:   State.GASNET_SEGMENT,
-    State.GASNET_SEGMENT:   State.GASNET_VERSION,
-    State.GASNET_VERSION:   State.PREFIX
+    State.GASNET_SEGMENT:   State.PREFIX
 }
 
 # Some of the CHPL_*_DEBUG variables add a "-debug" suffix to the component