Remove unused formatter BUILD deps after include cleanup

iterator-range and absl core_headers are unused after the #2542
refactor dropped make_range and ABSL_FALLTHROUGH_INTENDED.

verible/verilog/formatting/BUILD

diff --git a/verible/verilog/formatting/BUILD b/verible/verilog/formatting/BUILD
index 6150594..6431226 100644
--- a/verible/verilog/formatting/BUILD
+++ b/verible/verilog/formatting/BUILD
@@ -163,7 +163,6 @@
         "//verible/common/util:expandable-tree-view",
         "//verible/common/util:interval",
         "//verible/common/util:interval-set",
-        "//verible/common/util:iterator-range",
         "//verible/common/util:logging",
         "//verible/common/util:spacer",
         "//verible/common/util:tree-operations",
@@ -175,7 +174,6 @@
         "//verible/verilog/analysis:verilog-equivalence",
         "//verible/verilog/parser:verilog-token-enum",
         "//verible/verilog/preprocessor:verilog-preprocess",
-        "@abseil-cpp//absl/base:core_headers",
         "@abseil-cpp//absl/log:die_if_null",
         "@abseil-cpp//absl/status",
         "@abseil-cpp//absl/status:statusor",