Remove all usages of target= in gradle builds

This is now a lint warning. target= in gradle builds does nothing, so
they were useless. Moreover, most of the targets are already properly
set in these apps.

metadata/com.igormaznitsa.piratedice.txt

@@ -19,13 +19,9 @@ Build:1.0.2,3
     subdir=PirateDice
     gradle=yes
     srclibs=SVGAndroid2-raydac@c73d3658bac43c5cfc703e360b46085d529d916c
-    rm=PirateDice/libs/*.jar
     prebuild=cp -fR $$SVGAndroid2-raydac$$/src/main/java/com src/main/java/
-    target=android-10
 
 Maintainer Notes:
-* Force target due SVGAndroid requires android.util.Base64, which is only available
-  in android-8+.
 * Our SVGAndroid is missing SVG.resizePictureAsBitmap, so maybe we are using the wrong
   version. Wait for https://github.com/raydac/AndroidPirateDice/issues/3 .
 .

metadata/de.j4velin.wifiAutoOff.txt

@@ -60,13 +60,11 @@ Build:1.4.2,142
     commit=415388357b4e669d8dd46cce332ebe6c65854f55
     gradle=yes
     prebuild=touch key.properties
-    target=android-19
 
 Build:1.4.4,144
     commit=bc58b160be5d1c5f075f801eaa499cfe00cb6cfd
     gradle=yes
     prebuild=touch key.properties
-    target=android-19
 
 Build:1.4.5,145
     disable=ZipException: invalid entry compressed size

metadata/de.live.gdev.cherrymusic.txt

@@ -25,7 +25,6 @@ Build:1.1,2
     commit=v1.1
     subdir=app
     gradle=yes
-    target=android-23
 
 Auto Update Mode:Version v%v
 Update Check Mode:Tags

metadata/de.live.gdev.timetracker.txt

@@ -29,7 +29,6 @@ Build:1.11,8
     commit=v1.11
     subdir=app
     gradle=yes
-    target=android-23
 
 Auto Update Mode:Version v%v
 Update Check Mode:Tags

metadata/de.yaacc.txt

@@ -54,13 +54,11 @@ Build:1.1.5,9
     commit=RELEASE-1.1.5
     subdir=yaacc
     gradle=yes
-    target=android-17
 
 Build:1.1.6,10
     commit=RELEASE-1.1.6
     subdir=yaacc
     gradle=yes
-    target=android-17
 
 Build:1.1.7,11
     disable=pre-release

metadata/org.gnucash.android.txt

@@ -194,7 +194,6 @@ Build:1.6.1,16100
         sed -i -e "s/.*viewpagerindicator.*/project(':ViewPagerIndicator'),/" build.gradle && \
         sed -i -e "/MPAndroidChart/d" build.gradle && \
         sed -i -e '/variant.outputs.each/,/ }/ d' build.gradle
-    target=android-19
 
 Build:1.6.2,16200
     commit=v1.6.2
@@ -221,7 +220,6 @@ Build:1.6.2,16200
         sed -i -e "s/.*viewpagerindicator.*/project(':ViewPagerIndicator'),/" build.gradle && \
         sed -i -e "/MPAndroidChart/d" build.gradle && \
         sed -i -e '/variant.outputs.each/,/ }/ d' build.gradle
-    target=android-19
 
 Build:1.6.3,16300
     commit=v1.6.3
@@ -248,7 +246,6 @@ Build:1.6.3,16300
         sed -i -e "s/.*viewpagerindicator.*/project(':ViewPagerIndicator'),/" build.gradle && \
         sed -i -e "/MPAndroidChart/d" build.gradle && \
         sed -i -e '/variant.outputs.each/,/ }/ d' build.gradle
-    target=android-19
 
 Maintainer Notes:
 Dynamic version code, so no UCM can be used.