ENH: Removed old solver include files for SIMPLE and PISO

src/finiteVolume/cfdTools/general/include/readPIMPLEControls.H

-    const dictionary& pimpleDict = mesh.solutionDict().subDict("PIMPLE");
-
-    const int nOuterCorr =
-        pimpleDict.lookupOrDefault<int>("nOuterCorrectors", 1);
-
-    const int nCorr =
-        pimpleDict.lookupOrDefault<int>("nCorrectors", 1);
-
-    const int nNonOrthCorr =
-        pimpleDict.lookupOrDefault<int>("nNonOrthogonalCorrectors", 0);
-
-    const bool momentumPredictor =
-        pimpleDict.lookupOrDefault("momentumPredictor", true);
-
-    const bool transonic =
-        pimpleDict.lookupOrDefault("transonic", false);
-

src/finiteVolume/cfdTools/general/include/readSIMPLEControls.H

-    const dictionary& simple = mesh.solutionDict().subDict("SIMPLE");
-
-    const int nNonOrthCorr =
-        simple.lookupOrDefault<int>("nNonOrthogonalCorrectors", 0);
-
-    const bool momentumPredictor =
-        simple.lookupOrDefault("momentumPredictor", true);
-
-    const bool transonic =
-        simple.lookupOrDefault("transonic", false);
-