hotspot_clip() unnecessarily reports removing zero rows from data

[mpjashby]

Describe the bug
hotspot_clip() produces a message if it has removed rows from the data that are outside the clipped area. However, the function currently also produces this message even if it doesn't actually remove any rows from the data.

To Reproduce

library(sfhotspot)

# No rows from the data have been removed so there is no need for the message
# produced here
clipped_robberies <- hotspot_clip(memphis_robberies_jan, memphis_precincts)
#> Removed 0 rows (0.0% of original rows) from `data`

^{Created on 2025-07-30 with reprex v2.1.1}

[mpjashby]

This should be fixed by making this code conditional on rows_removed > 0:

sfhotspot/R/hotspot_clip.R

Lines 49 to 55 in 6b3caf7

	cli::cli_inform(
	paste0(
	"Removed {format(rows_removed, big.mark = ',', scientific = FALSE)} ",
	"rows ({sprintf('%0.1f%%', (rows_removed / initial_rows) * 100)} of ",
	"original rows) from {.var data}"
	)
	)