fix tests

Author: mununki

jscomp/test/alias_default_value_test.res

@@ -3,7 +3,6 @@
 })
 
 module C0 = {
-  let a = 1
   @react.component
   let make = (~a=2, ~b=a * 2) => {
     React.int(a + b)

res_syntax/tests/ppx/react/defaultValueProp.res

@@ -1,5 +1,4 @@
 module C0 = {
-  let a = 1
   @react.component
   let make = (~a=2, ~b=a*2) => React.int(a + b)
 }