badwords: avoid 'simply'

It's mostly a filler word. I've read through each use of it in the code
base and did minor rephrasings when "simply" carried some meaning. The
overwhelming majority of cases, removing it improved the text
significantly. Inspired by #20793.

Closes #20822

scripts/badwords.txt

@@ -90,6 +90,7 @@ will:rewrite to present tense
 64-bits:64 bits
 very:rephrase using an alternative word
 just:rephrase using an alternative word
+simply:rephrase using an alternative word
 Curl=curl
 cURL=curl
 Libcurl=libcurl

scripts/checksrc.pl

@@ -1189,7 +1189,7 @@ sub scanfile {
         # which are tracked in the Git repo and edited in the workdir, or
         # committed locally on the branch without being in upstream master.
         #
-        # The simple and naive test is to simply check for the current year,
+        # The simple and naive test is to check for the current year,
         # but updating the year even without an edit is against project policy
         # (and it would fail every file on January 1st).
         #