Remove [set|with]Property(String, String) variants from MockEnvironment

Since setProperty(String, Object) and withProperty(String, Object)
methods were introduced in MockEnvironment in 6.2.8, this commit removes
the obsolete variants with (String, String) signatures.

See gh-34947
Closes gh-34948

Author: sbrannen

spring-test/src/main/java/org/springframework/mock/env/MockEnvironment.java

@@ -50,14 +50,6 @@ public void setProperty(String name, Object value) {
 		this.propertySource.setProperty(name, value);
 	}
 
-	/**
-	 * Set a property on the underlying {@link MockPropertySource} for this environment.
-	 * @see #setProperty(String, Object)
-	 */
-	public void setProperty(String name, String value) {
-		this.propertySource.setProperty(name, value);
-	}
-
 	/**
 	 * Convenient synonym for {@link #setProperty(String, Object)} that returns
 	 * the current instance.
@@ -71,16 +63,4 @@ public MockEnvironment withProperty(String name, Object value) {
 		return this;
 	}
 
-	/**
-	 * Convenient synonym for {@link #setProperty(String, String)} that returns
-	 * the current instance.
-	 * <p>Useful for method chaining and fluent-style use.
-	 * @return this {@link MockEnvironment} instance
-	 * @see #withProperty(String, Object)
-	 */
-	public MockEnvironment withProperty(String name, String value) {
-		setProperty(name, value);
-		return this;
-	}
-
 }