remove more unneeded posix()

Author: scivision

+stdlib/handle2filename.m

@@ -9,7 +9,7 @@
 n = '';
 
 if fileHandle >= 0
-  n = stdlib.posix(fopen(fileHandle));
+  n = fopen(fileHandle);
 end
 
 end

+stdlib/which.m

@@ -17,7 +17,7 @@
 exe = string.empty;
 
 if isfile(filename) && stdlib.is_exe(filename)
-  exe = stdlib.posix(filename);
+  exe = filename;
   return
 end
 
@@ -41,9 +41,9 @@
   e = p + "/" + filename;
   if isfile(e) && stdlib.is_exe(e)
     if find_all
-      exe(end+1) = stdlib.posix(e); %#ok<AGROW>
+      exe(end+1) = e; %#ok<AGROW>
     else
-      exe = stdlib.posix(e);
+      exe = e;
       return
     end
   end

test/TestIni.m

@@ -7,7 +7,7 @@ function test_example(tc)
 import matlab.unittest.constraints.IsFile
 
 cwd = fileparts(mfilename('fullpath'));
-example = stdlib.posix(cwd) + "/example.ini";
+example = cwd + "/example.ini";
 
 tc.assumeThat(example, IsFile)