ShellPkg/UefiShellLevel3CommandsLib: Remove unnecessary EFIAPI

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Chen A Chen <chen.a.chen@intel.com>
Reviewed-by: Jaben Carsey <jaben.carsey@intel.com>
Reviewed-by: Ruiyu Ni <Ruiyu.ni@intel.com>

ShellPkg/Library/UefiShellLevel3CommandsLib/Alias.c

@@ -24,7 +24,6 @@
   @return any return code from GetNextVariableName except EFI_NOT_FOUND
 **/
 SHELL_STATUS
-EFIAPI
 PrintAllShellAlias(
   VOID
   )

ShellPkg/Library/UefiShellLevel3CommandsLib/Help.c

@@ -37,7 +37,6 @@
    @retval EFI_SUCCESS        the operation was successful.
 **/
 EFI_STATUS
-EFIAPI
 LexicalInsertIntoList(
   IN OUT   CHAR16 **DestList, 
   IN OUT   UINTN  *DestSize,
@@ -116,7 +115,6 @@ LexicalInsertIntoList(
    @retval EFI_SUCCESS        the operation was successful.
 **/
 EFI_STATUS
-EFIAPI
 CopyListOfCommandNames(
   IN OUT   CHAR16       **DestList, 
   IN OUT   UINTN        *DestSize,
@@ -147,7 +145,6 @@ CopyListOfCommandNames(
 **/
 STATIC
 EFI_STATUS
-EFIAPI
 CopyListOfCommandNamesWithDynamic(
   IN OUT  CHAR16** DestList, 
   IN OUT  UINTN    *DestSize
@@ -205,7 +202,6 @@ CopyListOfCommandNamesWithDynamic(
   @retval EFI_DEVICE_ERROR        The help data format was incorrect.
 **/
 EFI_STATUS
-EFIAPI
 PrintDynamicCommandHelp(
   IN CONST CHAR16  *CommandToGetHelpOn,
   IN CONST CHAR16  *SectionToGetHelpOn,

ShellPkg/Library/UefiShellLevel3CommandsLib/Touch.c

@@ -26,7 +26,6 @@
   @retval EFI_SUCCESS       The operation was successful.
 **/
 EFI_STATUS
-EFIAPI
 TouchFileByHandle (
   IN EFI_HANDLE Handle
   )
@@ -65,7 +64,6 @@ TouchFileByHandle (
   @retval EFI_SUCCESS           The operation was successful.
 **/
 EFI_STATUS
-EFIAPI
 DoTouchByHandle (
   IN CONST CHAR16       *Name,
   IN       CHAR16       *FS,

ShellPkg/Library/UefiShellLevel3CommandsLib/Type.c

@@ -30,7 +30,6 @@
   @retval EFI_SUCCESS           The operation was successful.
 **/
 EFI_STATUS
-EFIAPI
 TypeFileByHandle (
   IN SHELL_FILE_HANDLE Handle,
   IN BOOLEAN Ascii,