Remove unused args from specifier-less JITDUMP calls

[tannergooding]

Follow-up to #130837.

Several JITDUMP calls pass a trailing argument to a format string that has no corresponding % specifier, so the argument is silently ignored. This removes those leftover args. All are DEBUG-only and behavior is unchanged.

• lower.cpp -- JITDUMP("Argument is a local\n", numRegs, stackSeg.Size) (the one called out in JIT: Cleanup and harden lowering #130837)
• importercalls.cpp -- arrayElemSize
• importervectorization.cpp -- str
• inductionvariableopts.cpp -- dspTreeID(...) (redundant; the following DISPTREE already dumps the tree) and lclNum
• optimizer.cpp -- lclNum
• rangecheck.cpp -- expr (two sites)

Found by scanning every .cpp under src/coreclr/jit for literal format strings with no conversion but a trailing argument; these were the only hits.

Note

This PR description and the changes were drafted with GitHub Copilot.

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[Copilot]

Pull request overview

This PR removes unused trailing arguments from JITDUMP calls whose format strings have no corresponding conversion specifiers, eliminating dead argument evaluation in DEBUG-only diagnostic paths across the JIT.

Changes:

• Remove unconsumed arguments from several JITDUMP("...\n", unusedArg) call sites in CoreCLR JIT sources.
• Keep diagnostic output text unchanged while avoiding redundant argument computation/passing in DEBUG builds.

Show a summary per file

File	Description
src/coreclr/jit/lower.cpp	Drops unused args from a verbose-only “Argument is a local” JITDUMP.
src/coreclr/jit/importercalls.cpp	Removes unused arrayElemSize argument from a SET-intrinsic rejection JITDUMP.
src/coreclr/jit/importervectorization.cpp	Removes unused trailing str argument from two debug unrolling JITDUMP sites.
src/coreclr/jit/inductionvariableopts.cpp	Removes unused dspTreeID(...)/lclNum args from debug dumps where the format string doesn’t consume them.
src/coreclr/jit/optimizer.cpp	Removes unused lclNum arg from a dead-store-removal debug JITDUMP.
src/coreclr/jit/rangecheck.cpp	Removes unused expr arg from debug-only range worker bracket JITDUMPs.

Copilot's findings

• Files reviewed: 6/6 changed files
• Comments generated: 0

[JulieLeeMSFT]

/ba-g comment only change.