Remove obsolete SMW version checks

[alistair3149]

The extension now requires SemanticMediaWiki >= 7.0 (see extension.json), so the version_compare( SMW_VERSION, '1.6.1', '>' ) and version_compare( SMW_VERSION, '1.7.2', '>' ) guards in CompoundQueryProcessor are always true on every supported version. This removes the dead branches and keeps the code paths that always executed:

• queryAndMergeResults() and getQueryResultFromQueryString(): unwrap the always-true addThisPrintout() / getProcessedParams() calls.
• getResultFromQueryResult(): collapse the format lookup to $params['format']->getValue() and drop the unreachable pre-1.6.1 else branch (which called getResultFormat(), no longer present in SMW 7.0).

This is dead-code removal only — no behavior change on any supported SMW version, so there is no release-notes entry.

The !defined( 'SMW_VERSION' ) presence guard in SemanticCompoundQueries.php is intentionally left in place: it checks that Semantic MediaWiki is loaded at all, which is a different concern from the version comparisons removed here.

🤖 Generated with Claude Code

[codecov]

Codecov Report

❌ Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 30.08%. Comparing base (33cc6fb) to head (3703ec1).

Files with missing lines	Patch %	Lines
src/CompoundQueryProcessor.php	0.00%	5 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master      #93      +/-   ##
============================================
+ Coverage     28.57%   30.08%   +1.51%     
+ Complexity       44       40       -4     
============================================
  Files             3        3              
  Lines           119      113       -6     
============================================
  Hits             34       34              
+ Misses           85       79       -6     

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