Revert "[maven-release-plugin] prepare branch release/0.9.0"

This reverts commit d443b9a3e417a5d731372c154664ab0a61e044f1.
diff --git a/compiler-common/pom.xml b/compiler-common/pom.xml
index 250beae..f038fe4 100644
--- a/compiler-common/pom.xml
+++ b/compiler-common/pom.xml
@@ -17,7 +17,8 @@
   limitations under the License.
 
 -->
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <modelVersion>4.0.0</modelVersion>
 
     <parent>
diff --git a/compiler-externc/pom.xml b/compiler-externc/pom.xml
index bb89250..3c572af 100644
--- a/compiler-externc/pom.xml
+++ b/compiler-externc/pom.xml
@@ -17,7 +17,8 @@
   limitations under the License.
 
 -->
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <modelVersion>4.0.0</modelVersion>
 
   <parent>
diff --git a/pom.xml b/pom.xml
index bd50dba..5f9db75 100644
--- a/pom.xml
+++ b/pom.xml
@@ -38,7 +38,7 @@
     <connection>scm:git:git@github.com:apache/royale-compiler.git</connection>
     <developerConnection>scm:git:git@github.com:apache/royale-compiler.git</developerConnection>
     <url>scm:git:git@github.com:apache/royale-compiler.git</url>
-    <tag>release/0.9.0</tag>
+    <tag>HEAD</tag>
   </scm>
 
   <properties>
diff --git a/swfutils/pom.xml b/swfutils/pom.xml
index df767cd..d3a5d44 100644
--- a/swfutils/pom.xml
+++ b/swfutils/pom.xml
@@ -17,7 +17,8 @@
   limitations under the License.
 
 -->
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <modelVersion>4.0.0</modelVersion>
 
   <parent>