tests: delete CharConv remains

Closes #14100

tests/data/test508

@@ -41,10 +41,6 @@ http://%HOSTIP:%HTTPPORT/%TESTNUMBER
 #
 # Verify data after the test has been "shot"
 <verify>
-<strippart>
-# remove CR that CURLOPT_TRANSFERTEXT added, when CharConv enabled:
-s/^(this is what we post to the silly web server)\r\n/$1\n/ if($has_charconv)
-</strippart>
 <protocol>
 POST /%TESTNUMBER HTTP/1.1
 Host: %HOSTIP:%HTTPPORT

tests/libtest/test1013.pl

@@ -46,7 +46,7 @@ $curl_protocols =~ /\w+: (.*)$/;
 @curl = split / /,$1;
 
 # These features are not supported by curl-config
-@curl = grep(!/^(Debug|TrackMemory|CharConv)$/i, @curl);
+@curl = grep(!/^(Debug|TrackMemory)$/i, @curl);
 @curl = sort @curl;
 
 # Read the output of curl-config

tests/runtests.pl

@@ -649,8 +649,6 @@ sub checksystemfeatures {
             $feature{"Kerberos"} = $feat =~ /Kerberos/i;
             # SPNEGO enabled
             $feature{"SPNEGO"} = $feat =~ /SPNEGO/i;
-            # CharConv enabled
-            $feature{"CharConv"} = $feat =~ /CharConv/i;
             # TLS-SRP enabled
             $feature{"TLS-SRP"} = $feat =~ /TLS-SRP/i;
             # PSL enabled