[j-w9]

Fixes ESLint problems in SysID and removes the fixed entries from eslint-suppressions.json. None of the changes alter behaviour.

• Declare variables that were implicitly global. Each was assigned without let/var, creating a global, but is only used within the function (or loop) that assigns it, and is not used by any other script on the page, so let does not change behaviour.
• Declare the matrix-filling variables in each function. rows, cols, cellSelector and inputElement were implicit globals shared by setMatrixA, setMatrixB, setH0 and setH1. Each function assigns them before reading them and none calls another, so declaring them locally does not change behaviour.
• Remove variables that are assigned but never read. temp_data in the compensation loops was an implicit global that nothing read; declaring it would only make it an unused local, so it is removed.

One commit per kind of fix; npm run lint passes.