scons: Simplify arch enum generation

C++ allows a trailing comma after the last item in an enum, so there
is no need for a special case.

Change-Id: I6ead36b4a8562b4a7a5aec88e4f6390182eedf56
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/34116
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
diff --git a/src/SConscript b/src/SConscript
index 4b6db44..9f82bdc 100644
--- a/src/SConscript
+++ b/src/SConscript
@@ -645,11 +645,8 @@
     # create an enum for any run-time determination of the ISA, we
     # reuse the same name as the namespaces
     code('enum class Arch {')
-    for i,isa in enumerate(isas):
-        if i + 1 == len(isas):
-            code('  $0 = $1', namespace(isa), define(isa))
-        else:
-            code('  $0 = $1,', namespace(isa), define(isa))
+    for isa in isas:
+        code('  $0 = $1,', namespace(isa), define(isa))
     code('};')
 
     code('''
@@ -690,11 +687,8 @@
     # create an enum for any run-time determination of the ISA, we
     # reuse the same name as the namespaces
     code('enum class GPUArch {')
-    for i,isa in enumerate(isas):
-        if i + 1 == len(isas):
-            code('  $0 = $1', namespace(isa), define(isa))
-        else:
-            code('  $0 = $1,', namespace(isa), define(isa))
+    for isa in isas:
+        code('  $0 = $1,', namespace(isa), define(isa))
     code('};')
 
     code('''