[cleanup] Remove IsTablePart check within ComputeMinAndMaxContentContribution

This check could never be reached as the we never reach this function
for a table-part.

Tables have their own (complex) rules for min-max sizing so removing
this to avoid future confusion.

Change-Id: I6345b82754e6e03615d8160e5a2b0738ac44971d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2042920Reviewed-by: Christian Biesinger <cbiesinger@chromium.org>
Reviewed-by: Morten Stenshorne <mstensho@chromium.org>
Commit-Queue: Ian Kilpatrick <ikilpatrick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#739441}

third_party/blink/renderer/core/layout/ng/ng_length_utils.cc

@@ -332,7 +332,7 @@ MinMaxSize ComputeMinAndMaxContentContribution(
     // sized different. So we just always let the table code handle this.
     // Replaced elements may size themselves using aspect ratios and block
     // sizes, so we pass that on as well.
-    if (box->IsTable() || box->IsTablePart() || box->IsLayoutReplaced()) {
+    if (box->IsTable() || box->IsLayoutReplaced()) {
       bool needs_size_reset = false;
       if (!box->HasOverrideContainingBlockContentLogicalHeight()) {
         box->SetOverrideContainingBlockContentLogicalHeight(