[eclipse-xtext/xtext#2849] ditch old tycho 2.7.5 builds

Signed-off-by: Christian Dietrich <christian.dietrich.opensource@gmail.com>

.github/workflows/build.yml

@@ -96,19 +96,6 @@ jobs:
           java-version: 11
       - name: Build
         run: xvfb-run scripts/greetings-tycho-2.33-J11.sh
-  build_tycho_J17_tycho_275:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-      - name: Set up JDK 17
-        uses: actions/setup-java@v3
-        with:
-          distribution: 'temurin'
-          java-version: 17
-      - name: Build
-        env:
-          EXTRA_ARGS : "-Dtycho-version=2.7.5" 
-        run: xvfb-run scripts/greetings-tycho-2.33.sh
   build_tycho_J17_tycho_40:
     runs-on: ubuntu-latest
     steps:
@@ -154,19 +141,6 @@ jobs:
           java-version: 17
       - name: Build
         run: xvfb-run scripts/domainmodel-2.33.sh
-  build_domain_tycho_30_J17:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-      - name: Set up JDK 17
-        uses: actions/setup-java@v3
-        with:
-          distribution: 'temurin'
-          java-version: 17
-      - name: Build
-        env:
-          EXTRA_ARGS : "-Dtycho-version=3.0.5" 
-        run: xvfb-run scripts/domainmodel-2.33.sh
   build_domain_tycho_40_J17:
     runs-on: ubuntu-latest
     steps:

domainmodel/2.33.0/org.eclipse.xtext.example.domainmodel.releng/pom.xml

@@ -24,7 +24,7 @@
 		<maven.compiler.source>11</maven.compiler.source>
 		<maven.compiler.target>11</maven.compiler.target>
 		<!-- Tycho settings -->
-		<tycho-version>2.7.5</tycho-version>
+		<tycho-version>3.0.5</tycho-version>
 		<targetplatform.groupId>${project.groupId}</targetplatform.groupId>
 		<targetplatform.artifactId>${project.groupId}.tp</targetplatform.artifactId>
 		<targetplatform.version>${project.version}</targetplatform.version>