builder: Remove old benchmark deltas code

extra/builder/benchmark/benchmark.factor

@@ -1,43 +0,0 @@
-
-USING: kernel continuations arrays assocs sequences sorting math
-       io io.styles prettyprint builder.util ;
-
-IN: builder.benchmark
-
-! : passing-benchmarks ( table -- table )
-!   [ second first2 number? swap number? and ] filter ;
-
-: passing-benchmarks ( table -- table ) [ second number? ] filter ;
-
-! : simplify-table ( table -- table ) [ first2 second 2array ] map ;
-
-: benchmark-difference ( old-table benchmark-result -- result-diff )
-  first2 >r
-  tuck swap at
-  r>
-  swap -
-  2array ;
-
-: compare-tables ( old new -- table )
-  [ passing-benchmarks ] bi@
-  [ benchmark-difference ] with map ;
-
-: benchmark-deltas ( -- table )
-  "../benchmarks" "benchmarks" [ eval-file ] bi@
-  compare-tables
-  sort-values ;
-
-: benchmark-deltas. ( deltas -- )
-  standard-table-style
-    [
-      [ [ "Benchmark" write ] with-cell [ "Delta (ms)" write ] with-cell ]
-      with-row
-      [ [ swap [ write ] with-cell pprint-cell ] with-row ]
-      assoc-each
-    ]
-  tabular-output ;
-
-: show-benchmark-deltas ( -- )
-  [ benchmark-deltas benchmark-deltas. ]
-    [ drop "Error generating benchmark deltas" . ]
-  recover ;