Revert "string trim"

This reverts commit 677e3142.

src/OpenFOAM/primitives/strings/stringOps/stringOps.H

@@ -48,7 +48,6 @@ SourceFiles
 #include "stringOpsSort.H"
 #include "stringOpsEvaluate.H"
 #include "wordRes.H"
-#include <utility>
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
@@ -257,16 +256,6 @@ namespace stringOps
     //  Return true if a replacement was successful.
     bool inplaceReplaceVar(std::string& s, const word& varName);
 
-    //- Find first and last non-space locations in string or sub-string
-    //- and return as a (pos, len) pair.
-    //  In the future this might become a std::smatch or a std::stringview
-    std::pair<size_t, size_t>
-    findTrim
-    (
-        const std::string& s,
-        size_t pos = 0,
-        size_t len = std::string::npos
-    );
 
     //- Return string trimmed of leading whitespace
     string trimLeft(const std::string& s);