Remove old/unused knative 1.7.0 prebuilt.

Needed to submit separately to work around b/235275073

Change-Id: I31a63501c9222b7bbc4f76e350306e17933d4b0c
diff --git a/linux-prebuilts.properties b/linux-prebuilts.properties
index 8655e34..eb62da4 100644
--- a/linux-prebuilts.properties
+++ b/linux-prebuilts.properties
@@ -1,2 +1 @@
-1.7.0=x86_64-unknown-linux-gnu-gcc-8.3.0-glibc-2.19-kernel-4.9-2
 1.7.10=x86_64-unknown-linux-gnu-gcc-8.3.0-glibc-2.19-kernel-4.9-2
diff --git a/nativeCompilerPrebuilts/releases/1.7.0/linux-x86_64/kotlin-native-prebuilt-linux-x86_64-1.7.0.tar.gz b/nativeCompilerPrebuilts/releases/1.7.0/linux-x86_64/kotlin-native-prebuilt-linux-x86_64-1.7.0.tar.gz
deleted file mode 100644
index 7b178fb..0000000
--- a/nativeCompilerPrebuilts/releases/1.7.0/linux-x86_64/kotlin-native-prebuilt-linux-x86_64-1.7.0.tar.gz
+++ /dev/null
Binary files differ
diff --git a/nativeCompilerPrebuilts/releases/1.7.0/macos-aarch64/kotlin-native-prebuilt-macos-aarch64-1.7.0.tar.gz b/nativeCompilerPrebuilts/releases/1.7.0/macos-aarch64/kotlin-native-prebuilt-macos-aarch64-1.7.0.tar.gz
deleted file mode 100644
index c7070e9..0000000
--- a/nativeCompilerPrebuilts/releases/1.7.0/macos-aarch64/kotlin-native-prebuilt-macos-aarch64-1.7.0.tar.gz
+++ /dev/null
Binary files differ
diff --git a/nativeCompilerPrebuilts/releases/1.7.0/macos-x86_64/kotlin-native-prebuilt-macos-x86_64-1.7.0.tar.gz b/nativeCompilerPrebuilts/releases/1.7.0/macos-x86_64/kotlin-native-prebuilt-macos-x86_64-1.7.0.tar.gz
deleted file mode 100644
index 9cbeb0d..0000000
--- a/nativeCompilerPrebuilts/releases/1.7.0/macos-x86_64/kotlin-native-prebuilt-macos-x86_64-1.7.0.tar.gz
+++ /dev/null
Binary files differ