Avoid INTERNAL_ERROR_RTEMS_INIT_TASK_ENTRY_IS_NULL

Replace a runtime check with a compile time assertion.  This makes the
INTERNAL_ERROR_RTEMS_INIT_TASK_ENTRY_IS_NULL obsolete.

Update #4181.

spec/build/testsuites/sptests/grp.yml

@@ -218,8 +218,6 @@ links:
   uid: spextensions01
 - role: build-dependency
   uid: spfatal01
-- role: build-dependency
-  uid: spfatal02
 - role: build-dependency
   uid: spfatal03
 - role: build-dependency

spec/build/testsuites/sptests/spfatal02.yml

@@ -1,19 +0,0 @@
-SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
-build-type: test-program
-cflags: []
-copyrights:
-- Copyright (C) 2020 embedded brains GmbH (http://www.embedded-brains.de)
-cppflags: []
-cxxflags: []
-enabled-by: true
-features: c cprogram
-includes: []
-ldflags: []
-links: []
-source:
-- testsuites/sptests/spfatal02/init.c
-stlib: []
-target: testsuites/sptests/spfatal02.exe
-type: build
-use-after: []
-use-before: []