Remove outdated link to cross build wiki from product editor

[vogella]

The content of the wiki is outdated and adding such information to a UI for maintaining the data feels misplaced.

Fixes #758

[github-actions]

Test Results

     273 files  +     91       273 suites  +91   1h 0m 54s ⏱️ + 23m 32s
  3 340 tests ±       0    3 308 ✔️  -        2  30 💤 ±  0  0 ❌ ±0  2 🔥 +2 
10 317 runs  +3 439  10 225 ✔️ +3 407  90 💤 +30  0 ❌ ±0  2 🔥 +2 

For more details on these errors, see this check.

Results for commit a2d645e. ± Comparison against base commit d6cee01.

♻️ This comment has been updated with latest results.

[HannesWell]

Sounds good, but please also remove the handling of the link in the org.eclipse.pde.internal.ui.editor.product.OverviewPage.linkActivated().

[vogella]

Sounds good, but please also remove the handling of the link in the org.eclipse.pde.internal.ui.editor.product.OverviewPage.linkActivated().

Thanks, done now

[vogella]

AFAIK I have not seen the build error in the log before. Version seems to have been increased for this plug-in already, so it is not one of these nice API baseline errors. @HannesWell do you know that is wrong here?

[HannesWell]

have not seen the build error in the log before. Version seems to have been increased for this plug-in already, so it is not one of these nice API baseline errors. @HannesWell do you know that is wrong here?

The log a bit further above tells it:

16:51:29  [INFO] --- tycho-apitools:4.0.2:verify (verify) @ org.eclipse.pde.ui ---
16:51:29  [INFO] Resolve API baseline for org.eclipse.pde:org.eclipse.pde.ui:eclipse-plugin:3.14.200-SNAPSHOT
16:51:35  [INFO] Resolve API tools runtime from MavenRepositoryLocation [location=https://download.eclipse.org/eclipse/updates/4.30-I-builds/]...
16:52:32  Some blocking (most likely link/compilation) errors are present:
16:52:32  [FATAL] File OverviewPage.java at line 119: The method openBrowser(String) from the type OverviewPage is never used locally (location: /home/jenkins/agent/workspace/eclipse.pde_PR-763/ui/org.eclipse.pde.ui/src/org/eclipse/pde/internal/ui/editor/product/OverviewPage.java)
16:52:32  Some blocking (most likely link/compilation) errors are present ^^^

Although this is actually not directly related to an API problem it is right that the openBrowser() method should be removed.

I updated the PR accordingly and also adjusted the wording of the footer to Fixes https://github.com/eclipse-pde/eclipse.pde/issues/758 to auto-link this PR with that issue.