remove an include from goto-programs/goto_program.h

[kroening]

This removes an unneeded include from goto-programs/goto_program.h, which is
widely used.

• Each commit message has a non-empty body, explaining why the change was made.
• n/a Methods or procedures I have added are documented, following the guidelines provided in CODING_STANDARD.md.
• n/a The feature or user visible behaviour I have added or modified has been documented in the User Guide in doc/cprover-manual/
• n/a Regression or unit tests are included, or existing tests cover the modified code (in this case I have detailed which ones those are in the commit message).
• n/a My commit message includes data points confirming performance improvements (if claimed).
• n/a My PR is restricted to a single feature or bugfix.
• White-space or formatting changes outside the feature-related changed lines are in commits of their own.

[codecov]

Codecov Report

Merging #6312 (848d182) into develop (493bc71) will decrease coverage by 0.00%.
The diff coverage is 0.00%.

@@             Coverage Diff             @@
##           develop    #6312      +/-   ##
===========================================
- Coverage    75.98%   75.98%   -0.01%     
===========================================
  Files         1512     1512              
  Lines       163456   163459       +3     
===========================================
- Hits        124204   124203       -1     
- Misses       39252    39256       +4     

Impacted Files	Coverage Δ
...mc/src/java_bytecode/java_local_variable_table.cpp	95.22% <ø> (ø)
...nit/java-testing-utils/require_goto_statements.cpp	82.82% <ø> (ø)
...de/java_trace_validation/java_trace_validation.cpp	100.00% <ø> (ø)
src/analyses/local_bitvector_analysis.cpp	75.14% <ø> (ø)
src/analyses/local_cfg.h	75.00% <ø> (ø)
src/analyses/local_safe_pointers.cpp	81.55% <ø> (ø)
src/analyses/local_safe_pointers.h	100.00% <ø> (ø)
src/analyses/uncaught_exceptions_analysis.cpp	92.77% <ø> (ø)
...yses/variable-sensitivity/abstract_environment.cpp	95.02% <ø> (ø)
...riable-sensitivity/variable_sensitivity_domain.cpp	89.44% <ø> (ø)
... and 74 more

---

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[martin-cs]

Looks good.

[tautschnig]

Thank you for the clean-up, but I do have concerns about the code we had in the first place.