[doc](udf) remove the expiration_time in create function#3845
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### What problem does this PR solve? Problem Summary: doc apache/doris-website#3845 ``` CREATE FUNCTION print_12() RETURNS int PROPERTIES ( "file" = "file:///path/to/java-udf-demo-jar-with-dependencies.jar", "symbol" = "org.apache.doris.udf.Print", "always_nullable"="true", "type" = "JAVA_UDF", "static_load" = "true", // default value is false "expiration_time" = "60" // default value is 360 minutes ); ``` ``` before in the java-udf could use static_load and expiration_time to control the cache jar times in BE. which use a backgroud thread to scan the jars every ten minutes, check it's init times, and then drop it if time expire. those will cause some long running query failed when the backgroud thread remove it. Now, remove the expiration_time, and the jar will be clean when drop fucntion immediately ```
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### What problem does this PR solve? Problem Summary: doc apache/doris-website#3845 ``` CREATE FUNCTION print_12() RETURNS int PROPERTIES ( "file" = "file:///path/to/java-udf-demo-jar-with-dependencies.jar", "symbol" = "org.apache.doris.udf.Print", "always_nullable"="true", "type" = "JAVA_UDF", "static_load" = "true", // default value is false "expiration_time" = "60" // default value is 360 minutes ); ``` ``` before in the java-udf could use static_load and expiration_time to control the cache jar times in BE. which use a backgroud thread to scan the jars every ten minutes, check it's init times, and then drop it if time expire. those will cause some long running query failed when the backgroud thread remove it. Now, remove the expiration_time, and the jar will be clean when drop fucntion immediately ```
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