checker: update enum test

Author: medvednikov

vlib/v/checker/tests/enum_err.out

@@ -5,10 +5,3 @@ vlib/v/checker/tests/enum_err.vv:4:13: error: default value for enum has to be a
       |             ~~~~~~~
     5 |     yellow = 1+1
     6 |     blue
-vlib/v/checker/tests/enum_err.vv:5:14: error: default value for enum has to be an integer
-    3 | enum Color {
-    4 |     green = 'green'
-    5 |     yellow = 1+1
-      |              ~~~
-    6 |     blue
-    7 | }

vlib/v/checker/tests/enum_err.vv

@@ -2,7 +2,7 @@ module main
 
 enum Color {
     green = 'green'
-    yellow = 1+1
+    yellow
     blue
 }