remove (square) radius parameter

this parameter didn't make sense because
the resulting neighborhood wasn't necessarily square.

to actually implement this feature would require
an extension to make_offset_list.

README.md

@@ -33,9 +33,6 @@ usage:
   -N  --neighbors
         points to use when sampling
         range: [0,1024];    default: 29
-  -r  --radius
-        square neighborhood, always odd
-        range: [0,32];      default: [n/a]
   -R  --circle-radius
         circle neighborhood radius
         range: [1,128];     default: [n/a]
@@ -56,8 +53,6 @@ usage:
         required            default: [none]
 ```
 
-the `radius` parameter should probably be removed.
-
 ### neighborhood
 
 offsets are sorted in ascending distance from the center (the 0,0 point).

resynth.c

@@ -461,13 +461,6 @@ int main(int argc, char *argv[]) {
 "        range: [0,1024];    default: 29")
             parameters.neighbors = kyaa_flag_arg;
 
-        KYAA_FLAG_LONG('r', "radius",
-"        square neighborhood, always odd\n"
-"        range: [0,32];      default: [n/a]")
-            int radius = kyaa_flag_arg;
-            radius = 2 * MAX(radius, 0) + 1;
-            parameters.neighbors = radius * radius;
-
         KYAA_FLAG_LONG('R', "circle-radius",
 "        circle neighborhood radius\n"
 "        range: [1,128];     default: [n/a]")