Perf: remove redundant code from PlayerExecution (#2299)

## Description:

Remove some lines of code that do nothing in surroundedBySamePlayer,
gain a small bit of performance back. The code says "if it is an ocean
shore tile but not an ocean shore tile" which can never be true.


(Why where the lines there and why can they be removed:

Before you were able to boat on a lake, you had no escape from your land
if it bordered a lake and no ocean. So it was logical, if you bordered a
lake with your cluster, to still treat it as fully surrounded annexable
land.

This is why this code was added in [this
commit](https://github.com/openfrontio/OpenFrontIO/commit/ee56d687484131c092599434247b3a036e0e9668)
back then:

`const isOceanShore = this.mg.isOceanShore(tile); if
(this.mg.isShore(tile) && !isOceanShore) { continue; }`

But [this newer
commit](https://github.com/openfrontio/OpenFrontIO/commit/c1383d76f1f76c5e5f9be3a6f30b8f3010258540#diff-fb1101a2b50dd7c353d082ff7a3351cff5469b8249b3ebca91c10573a3dfaaf1)
made it so you could from then on boat on lakes. So you have an escape
from your cluster since then. And just like being on the edge of the map
or when bordering the ocean, this means your cluster won't get annexed.

However, while the updated code for PlayerExecution in the last commit
does its work as intended (it does not exclude lake shore tiles
anymore)... The code contradicts itself:

`const isOceanShore = this.mg.isOceanShore(tile); if
(this.mg.isOceanShore(tile) && !isOceanShore) { continue;}`

Conclusion: the code on lines 136-138 can be deleted because it
literally says "if it is an ocean shore tile but not an ocean shore
tile" which can never be true. Also remove the const and check
isOceanShore directly in the if statement.)

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:

tryout33

src/core/execution/PlayerExecution.ts

@@ -132,12 +132,8 @@ export class PlayerExecution implements Execution {
   private surroundedBySamePlayer(cluster: Set<TileRef>): false | Player {
     const enemies = new Set<number>();
     for (const tile of cluster) {
-      const isOceanShore = this.mg.isOceanShore(tile);
-      if (this.mg.isOceanShore(tile) && !isOceanShore) {
-        continue;
-      }
       if (
-        isOceanShore ||
+        this.mg.isOceanShore(tile) ||
         this.mg.isOnEdgeOfMap(tile) ||
         this.mg.neighbors(tile).some((n) => !this.mg?.hasOwner(n))
       ) {