Update test cases to include an additional variable in deletion-only diff scenarios

Author: robertpiosik

apps/editor/src/commands/apply-chat-response-command/utils/diff-processor/test-cases/deletion-only/expected.txt

@@ -1,2 +1,3 @@
 const a = 1
 const c = 3
+const e = 5

apps/editor/src/commands/apply-chat-response-command/utils/diff-processor/test-cases/deletion-only/original.txt

@@ -2,3 +2,4 @@ const a = 1
 const b = 2
 const c = 3
 const d = 4
+const e = 5