ShellPkg: Remove current working dir path ".;" from 'path' variable

As per ECR 1349, latest UEFI Shell 2.2 specification has removed current working directory
path ".;" from a default 'path' environment variable as current working directory always
search first in system.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Tapan Shah <tapandshah@hpe.com>
Reviewed-by: Jaben Carsey <jaben.carsey@intel.com>
diff --git a/ShellPkg/Library/UefiShellCommandLib/UefiShellCommandLib.c b/ShellPkg/Library/UefiShellCommandLib/UefiShellCommandLib.c
index a97361c..b65676b 100644
--- a/ShellPkg/Library/UefiShellCommandLib/UefiShellCommandLib.c
+++ b/ShellPkg/Library/UefiShellCommandLib/UefiShellCommandLib.c
@@ -1227,10 +1227,8 @@
     ASSERT((NewPath == NULL && NewPathSize == 0) || (NewPath != NULL));

     if (OriginalPath != NULL) {

       StrnCatGrow(&NewPath, &NewPathSize, OriginalPath, 0);

-    } else {

-      StrnCatGrow(&NewPath, &NewPathSize, L".\\", 0);

+      StrnCatGrow(&NewPath, &NewPathSize, L";", 0);

     }

-    StrnCatGrow(&NewPath, &NewPathSize, L";", 0);

     StrnCatGrow(&NewPath, &NewPathSize, Name, 0);

     StrnCatGrow(&NewPath, &NewPathSize, L"\\efi\\tools\\;", 0);

     StrnCatGrow(&NewPath, &NewPathSize, Name, 0);