testing: Delete useless ert tests

* testing/lisp/test-ob-C.el: Delete useless test.

* testing/lisp/test-ob-fortran.el: Delete useless test.

* testing/lisp/test-ob-lilypond.el: Delete useless test.

* testing/lisp/test-ob-maxima.el: Delete useless test.

testing/lisp/test-ob-C.el

@@ -22,9 +22,6 @@
 (unless (featurep 'ob-C)
   (signal 'missing-test-dependency "Support for C code blocks"))
 
-(ert-deftest ob-C/assert ()
-  (should t))
-
 (ert-deftest ob-C/simple-program ()
   "Hello world program."
   (if (executable-find org-babel-C++-compiler)

testing/lisp/test-ob-fortran.el

@@ -23,9 +23,6 @@
 (unless (featurep 'ob-fortran)
   (signal 'missing-test-dependency "Support for Fortran code blocks"))
 
-(ert-deftest ob-fortran/assert ()
-  (should t))
-
 (ert-deftest ob-fortran/simple-program ()
   "Test of hello world program."
   (org-test-at-id "459384e8-1797-4f11-867e-dde0473ea7cc"

testing/lisp/test-ob-lilypond.el

@@ -26,9 +26,6 @@
         (file-name-directory
          (or load-file-name (buffer-file-name)))))
 
-(ert-deftest ob-lilypond/assert ()
-  (should t))
-
 (ert-deftest ob-lilypond/feature-provision ()
   (should (featurep 'ob-lilypond)))
 

testing/lisp/test-ob-maxima.el

@@ -22,9 +22,6 @@
 (unless (featurep 'ob-maxima)
   (signal 'missing-test-dependency "Support for Maxima code blocks"))
 
-(ert-deftest ob-maxima/assert ()
-  (should t))
-
 (ert-deftest ob-maxima/integer-input ()
   "Test of integer input"
   (org-test-at-id "b5842ed4-8e8b-4b18-a1c9-cef006b6a6c8"